| 摘要 |
An information retrieval device includes an input operation unit that can input a character through an operation of a user, a database that stores data of a plurality of character strings beforehand, an information extraction unit that checks a character string inputted by the input operation unit with the data of the character strings stored in the database, and extracts the data of a character string corresponding to the character string inputted by the input operation unit from the database, and a display unit that displays the character string extracted by the information extraction unit, wherein the information extraction unit performs the check by replacing each character in at least one of the character string inputted by the input operation unit and the character strings stored in the database with a character contained in a classified character group predetermined in compliance with an attribute of each character.
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